公开(公告)号：US12078515B2

公开(公告)日：2024-09-03

申请号：US17904414

申请日：2021-02-09

申请人： MultiDimension Technology Co., Ltd.

发明人： Haiping Guo ,  Weifeng Shen ,  Songsheng Xue ,  Haochen Li

IPC分类号： G01D5/16 ,  G01D5/14

CPC分类号： G01D5/16 ,  G01D5/142

摘要： Disclosed is linear displacement absolute position encoder used for measuring displacement of a tested apparatus. The linear displacement absolute position encoder comprises a base, a magnetoresistive sensor array, an encoding strip, and a back magnet. The encoding strip is fixed on the base and extends in the direction of a rail of the tested apparatus. The encoding strip is a magnetic material block having recess and protrusion for identifying encoding information of different positions. The magnetoresistive sensor array is arranged between the encoding strip and the back magnet in a non-contact manner. The back magnet is used for generating a non-uniform magnetic field around the encoding strip so as to magnetize the encoding strip. The magnetoresistive sensor array is used for acquiring the position encoding information of the encoding strip by detecting magnetic field information of the encoding strip. The encoder is low cost and can monitor large distances.